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Open-Source Tool cad3dify Turns 2D CAD Images Into 3D STEP Files Using VLMs

June 28, 2026 at 23:44 EDT

AI Agents
Open Source
Manufacturing

Developer neka-nat has released cad3dify, an open-source tool that uses a Vision Language Model (VLM) and AI agents to interpret 2D CAD images and convert them into editable 3D STEP files. The project is available on GitHub under the MIT license.

Open Source · MIT License

AI Agents Turn a Flat 2D Drawing Into a Real 3D CAD Model

cad3dify and agent3dify read a CAD drawing image and reconstruct it into a STEP file — using a VLM-driven loop of agents that generate, run, verify, and refine the CAD code automatically.

PNG → STEP

2D image in, ISO-standard 3D file out

Foundation models supported, switchable in-app

MIT

Fully open-source license

THE AGENT LOOP — agent3dify

Supervisor

orchestrates agents

→

CadQuery Builder

writes the CAD code

→

Render Verifier

checks & feeds back

In cad3dify a CodeGenerator → PythonDebugger → Refiner chain plays the same role: generate code, execute and fix it, then improve the STEP output.

PROJECT TRACTION — early days (GitHub stars)

272

cad3dify

agent3dify

Both are new — broad real-world evaluation is still ahead.

PROMISE

Demos on clean drawings look strong. Output STEP files import into SolidWorks, Fusion 360 and other CAD tools — automating work that once needed manual effort and expertise.

CAVEAT

Even near-accurate results need fiddly dimensional tweaks, and accuracy can drop on real industrial drawings due to scan quality and complexity.

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